Dynamo-electric machinery.



L. v. GRLLLETILt 1. B. T'RUQHLTLT.l DYNAMO ELECTRIC MACHINERY.

APPLICATION FILED IAN-9.1914.

Patented-'May 4, 1915;

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LEGN VICTQR GRILLET AN) JEAN BAITISTE. TRUCHETET, 03F .,"EJRS,

DYNASIOELECTRC MACHNEEY.

Original application led october 18, 1911, Serial No. 655,325. Divided and this application filed Specification of Letters Patent. i

Patented lttay t,

January e, 191e. semi No. e1 1,234.

T0 all whom t may concern c Be it known that we, LEON VICTOR Genf LET and JEAN BAPTISTE TRUGHETET, both citizens of the French Republic, residing at 61 Rue de Bretagne', Paris, in the Department of Seine, France, have invented new /and useful Dynamo-Electric Machinery, of

which the following is a specification.

The subject matter of the present invention is matter divided from our application Serial No. 655,325 dated the 13th October 1911, of which it originally formed a part.

The invention relates to automatic regulating devices and is particularly applicable to sets comprising dynamo electric machines and batteries ot secondary cells.

The principle of the present invention is to replace and perform the same functions as the complicated controlling making and breaking switches hitherto in use.

Broadly the invention comprises a dynamo electric machine, the armature 'of which is axially-movable, which axial movement is made use of for breaking the charging circuit when circumstances render this latter desirable.

More particularly defined, the present invention comprises a dynamo electric Inachine having an armature capable of being displaced upon its shaft relatively to the ixed held magnets, this displacement determining when the external circuit shall' be broken by causing the .brushes to become insulated. The present invention may be em ployed either to join the dynamo to theV eX- ternal'circuit or to the battery, or to disconnect it from the external circuit when the voltage generated by the dynamo falls. below that of the battery. According to' to this invention with the driving pulley and belt and the charging circuit, the whole being shown in the oil' position., and Fg. 2' is a diagraninnitic view corresponding to F ig. l, in which the apparatus is in the on position.

Referring to the drawings, the dynan'zo shown as an example is a bipolar nia h with shunt excitation. The driving l A rotates in the bearings B and B and c ries a driving pulley A. llt peg or passes through the driving shaft il and serves after the manner of the driver of lathe. rl`his driver engages in ll (luitl grooves E orrecesses out in the thickness of a sleeve D mounted freely upon the shaft A. This sleeve is of sutlicient length to receive the armature ii1 ofv the dynamo, the commutator (i, and an insulating ring lol. The field windings or field poles of the d3# namo are shown at l', la, while the brushes are seen at'l, l@ and the batteryof secondary cells at l". A

is mentioned, above, when the driving shaft A is at rest the 'various members talte up the position shown in Fig. l; lVlfhen'lthe driving shaft rotates in the direction. shown by the arrowk it olloivsthat the movable sleeve D is displaced upon the shait'fi (Fig. 2) in such a way that the conimutator (l comes into contact with the brushes and so closes the charging circuit and insures that the secondary cells l will be charged by the dynamo. rl`he sleeve 'il is First displaced owing to the rotating ellect of the shalt because the driver C pushes upon the helical groove lil. :lifter-ward the armature slides under the influence of the electro-magnetic attraction between it and the lield 'magi'iets I and la. The displacement oli the sleeve D is limited by means of a stop such as a 'pin A2 fixed to the sh'aitt il.. instead ot this piu a spring stop ot the nature oi a, bulleriniglrt be used. I

lllhcn the battery of secondary cells P is being; charged by the dynamo (as is seen in llig. 2)., it the voltege of the dynamo descends below that ot the battery orvi'f the dynamo stops, current from the battery 1lrnvs back into the dynamo, 'transforms it iuto'a motor and the armature ll dragging bach; the sleeve 'll causes it to slide upon the shaft i by a sort or" screwing action between the driver C ai helical grooves The arrangement therefore returns to 'the position shown in liw l, the', is to say', insulating Mld ring is interposed beneath the brushes K', K2, so that the charging circuit is again broken. y

What-we claim is:

1 In an electrical generator, the combination of a eld structure, an armature, a shaft,

a sleeve mounted loosely on said shaft a i commutator carried by said sleeve, brus es on said commutator but insulated therefrom onvaxlal movement of said commutatorand a driving connection between said shaft and said sleeve causing relative axial vmovement between the two.

2. In an electrical generator, the combination of a eld structure, a shaft, a' sleeve Y mounted loosely on said shaft, an armature carried by said sleeve, a commutator carried by said sleeve, brushes on said commutator, an external circuit connectedto saidI generator, a driving connection between said shaft and said sleeve causing relative axial motion between the two and means operated by this motion to change the connections bel tween the external circuit and the generator.

3. In an electrical generator the combination of a field structure, f shaft, a sleeve mounted loosely on said shaft formed with a helical groove at one end, a driving pin fixed to said shaft and engaging in the 'groove to drive said sleeve and to move it axially, an armature carried by said sleeve, av commutator carried by said sleeve, and brushes contacting with said commutator but insulated therefrom upon the axial movement of the commutator with said sleeve.

4. In an electrical'generating system, the combination of a eld structure, a shaft, an armature slida'ble upon said shaft, a commutator integral with said armature, an insulating ring integral with said commutator, brushes in contactwith said comlnutator `but contacting with said insulating ring upon axial movement of the commutator, a driving connection between said shaft and said armature causing v the latter to slide upon said shaft, a secondary battery, electrical connections between said brushes andl 

